Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
vanh dai » van dai, vanh tai, lanh dao
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc day
ve cau » ke cau, va cau, ve cac
dai va » mai va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x hoi. hieu ve cau ((thuc va) OR (thuc dan)) vanh dai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ve cau ((thuc va) OR (thuc dan)) vanh dai va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ve cau ((thuc va) OR (thuc dan)) vanh dai va triet*.